package util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;

import net.sf.json.JSONException;
import net.sf.json.JSONObject;

public class GetToken {
	
    /**
     * 获取接口访问凭证
     * 
     * @param appid 凭证
     * @param appsecret 密钥
     * @return
     */
    public static String getAccess_token(String appid, String appsecret) {
            //凭证获取(GET)
            String token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
        String requestUrl = token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
        // 发起GET请求获取凭证
        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
                String access_token = null;
        if (null != jsonObject) {
            try {
                access_token = jsonObject.getString("access_token");
            } catch (Exception e) {
                // 获取token失败
             
            }
        }
        return access_token;
    }
    /**
     * 调用微信JS接口的临时票据
     * 
     * @param access_token 接口访问凭证
     * @return
     */
    public static String getJsApiTicket(String access_token) {
        String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";
        String requestUrl = url.replace("ACCESS_TOKEN", access_token);
        // 发起GET请求获取凭证
        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
        String ticket = null;
        if (null != jsonObject) {
            try {
                ticket = jsonObject.getString("ticket");
            } catch (Exception e) {
                // 获取token失败
               
            }
        }
        return ticket;
    }
    
    /**  
     * 发起http请求并获取结果  
     *   
     * @param requestUrl 请求地址  
     * @param requestMethod 请求方式（GET、POST）  
     * @param outputStr 提交的数据  
     * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)  
     */    
    public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {    
        JSONObject jsonObject = null;    
        StringBuffer buffer = new StringBuffer();  
        InputStream inputStream=null;  
        try {  
            URL url = new URL(requestUrl);  
            HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();    
            httpUrlConn.setDoOutput(true);    
            httpUrlConn.setDoInput(true);    
            httpUrlConn.setUseCaches(false);  
            // 设置请求方式（GET/POST）    
            httpUrlConn.setRequestMethod(requestMethod);    
            if ("GET".equalsIgnoreCase(requestMethod))    
                httpUrlConn.connect();    
    
            // 当有数据需要提交时    
            if (null != outputStr) {    
                OutputStream outputStream = httpUrlConn.getOutputStream();    
                // 注意编码格式，防止中文乱码    
                outputStream.write(outputStr.getBytes("UTF-8"));    
                outputStream.close();    
            }  
            //将返回的输入流转换成字符串    
            inputStream = httpUrlConn.getInputStream();    
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");    
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);    
    
            String str = null;    
            while ((str = bufferedReader.readLine()) != null) {    
                buffer.append(str);    
            }    
            bufferedReader.close();    
            inputStreamReader.close();    
            // 释放资源    
            inputStream.close();    
            inputStream = null;    
            httpUrlConn.disconnect();    
          jsonObject = JSONObject.fromObject(buffer.toString());  
        } catch (ConnectException ce) {    
              ce.printStackTrace();  
              System.out.println("Weixin server connection timed out");  
        } catch (Exception e) {    
               e.printStackTrace();  
               System.out.println("http request error:{}");  
        }finally{  
            try {  
                if(inputStream!=null){  
                    inputStream.close();  
                }  
            } catch (IOException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
        }   
        return jsonObject;    
    }   
    

}
